Shutikova A L, Leonova G N, Lubova V A
Somov Institute of Epidemiology and Microbiology, 690087, Vladivostok, Russia.
Klin Lab Diagn. 2019;64(7):424-429. doi: 10.18821/0869-2084-2019-64-7-424-429.
Molecular genetic monitoring of natural focal of tick-borne infections in the epidemic season of 2018 revealed infectiousness of ixodid ticks causative agents of tick-borne encephalitis (0.58% of cases), Lyme disease (31% of cases), human monocytic ehrlichiosis (1.6% of cases) and granulocytic anaplasmosis (3.9% of cases) is registered and also co-infections of ticks by these infections (2.9% of cases) is revealed in natural and anthropourgic foci (B. burgdorferi s.l.+A. phagocytophilum, B. burgdorferi s.l.+E. chaffeensis/E. muris and B. burgdorferi s.l.+tick-borne encephalitis virus). The major epidemiological importance of ticks of the species I. persulcatus is found, their share being 87,6%. The majority of patients being bitten by a tick were from the southern and southeast areas of Primorye. Contamination of ticks with Borrelia was revealed not only in I. persulcatus, but also in ticks of the Haemaphysalis and Dermacentor. The infectiousness of ticks of B. burgdorferi s.l. (42,3%), tick-borne encephalitis virus (7,7%) and A. phagocytophilum (15,4%) was highest on Russky Island.
2018年流行季节蜱传感染自然疫源地的分子遗传学监测显示，发现硬蜱具有感染性，其中蜱传脑炎病原体（占病例的0.58%）、莱姆病（占病例的31%）、人单核细胞埃立克体病（占病例的1.6%）和粒细胞无形体病（占病例的3.9%），并且在自然疫源地和人为疫源地还发现了蜱的这些感染合并感染情况（占病例的2.9%）（伯氏疏螺旋体狭义种+嗜吞噬细胞无形体、伯氏疏螺旋体狭义种+查菲埃立克体/鼠埃立克体以及伯氏疏螺旋体狭义种+蜱传脑炎病毒）。发现全沟硬蜱这一物种的蜱具有主要流行病学重要性，其占比为87.6%。大多数被蜱叮咬的患者来自滨海边疆区的南部和东南部地区。不仅在全沟硬蜱中发现蜱被伯氏疏螺旋体污染，在血蜱属和革蜱属的蜱中也有发现。在俄罗斯岛上，狭义伯氏疏螺旋体蜱（42.3%）、蜱传脑炎病毒蜱（7.7%）和嗜吞噬细胞无形体蜱（15.4%）的感染性最高。
